简便运算666.66*6666.7+99999*22.222
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![简便运算666.66*6666.7+99999*22.222](/uploads/image/z/2592693-45-3.jpg?t=%E7%AE%80%E4%BE%BF%E8%BF%90%E7%AE%97666.66%2A6666.7%2B99999%2A22.222)
简便运算666.66*6666.7+99999*22.222
简便运算666.66*6666.7+99999*22.222
简便运算666.66*6666.7+99999*22.222
666.66×6666.7+99999×22.222
=666.66×6666.7-22.222+100000*22.222
=30*22.222*6666.7-22.222+100000*22.222
=30*6666.7*22.222-22.222+100000*22.222
=(200001-1)*22.222+100000*22.222
=300000*22.222
=6666600